Synechocystis sp PCC 6803 strains lacking photosystem I and phycobilisome function. Shen, G, Boussiba, S, & Vermaas, W F The Plant Cell, 5(12):1853–1863, 1993. ![Synechocystis sp PCC 6803 strains lacking photosystem I and phycobilisome function [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper abstract bibtex To design an in vivo system allowing detailed analysis of photosystem II (PSII) complexes without significant interference from other pigment complexes, part of the psaAB operon coding for the core proteins of photosystem I (PSI) and part of the apcE gene coding for the anchor protein linking the phycobilisome to the thylakoid membrane were deleted from the genome of the cyanobacterium Synechocystis sp strain PCC 6803. Upon transformation and segregation at low light intensity (5 microE m-2 sec-1), a PSI deletion strain was obtained that is light tolerant and grows reasonably well under photoheterotrophic conditions at 5 microE m-2 sec-1 (doubling time approximately 28 hr). Subsequent inactivation of apcE by an erythromycin resistance marker led to reduction of the phycobilin-to-chlorophyll ratio and to a further decrease in light sensitivity. The resulting PSI-less/apcE- strain grew photoheterotrophically at normal light intensity (50 microE m-2 sec-1) with a doubling time of 18 hr. Deletion of apcE in the wild type resulted in slow photoautotrophic growth. The remaining phycobilins in apcE- strains were inactive in transferring light energy to PSII. Cells of both the PSI-less and PSI-less/apcE- strains had an approximately sixfold enrichment of PSII on a chlorophyll basis and were as active in oxygen evolution (on a per PSII basis) as the wild type at saturating light intensity. Both PSI-less strains described here are highly appropriate both for detailed PSII studies and as background strains to analyze site- and region-directed PSII mutants in vivo.
@article{shen_synechocystis_1993,
title = {Synechocystis sp {PCC} 6803 strains lacking photosystem {I} and phycobilisome function},
volume = {5},
issn = {1040-4651},
url = {http://www.ncbi.nlm.nih.gov/pubmed/8305875},
abstract = {To design an in vivo system allowing detailed analysis of photosystem II (PSII) complexes without significant interference from other pigment complexes, part of the psaAB operon coding for the core proteins of photosystem I (PSI) and part of the apcE gene coding for the anchor protein linking the phycobilisome to the thylakoid membrane were deleted from the genome of the cyanobacterium Synechocystis sp strain PCC 6803. Upon transformation and segregation at low light intensity (5 microE m-2 sec-1), a PSI deletion strain was obtained that is light tolerant and grows reasonably well under photoheterotrophic conditions at 5 microE m-2 sec-1 (doubling time approximately 28 hr). Subsequent inactivation of apcE by an erythromycin resistance marker led to reduction of the phycobilin-to-chlorophyll ratio and to a further decrease in light sensitivity. The resulting PSI-less/apcE- strain grew photoheterotrophically at normal light intensity (50 microE m-2 sec-1) with a doubling time of 18 hr. Deletion of apcE in the wild type resulted in slow photoautotrophic growth. The remaining phycobilins in apcE- strains were inactive in transferring light energy to PSII. Cells of both the PSI-less and PSI-less/apcE- strains had an approximately sixfold enrichment of PSII on a chlorophyll basis and were as active in oxygen evolution (on a per PSII basis) as the wild type at saturating light intensity. Both PSI-less strains described here are highly appropriate both for detailed PSII studies and as background strains to analyze site- and region-directed PSII mutants in vivo.},
language = {eng},
number = {12},
journal = {The Plant Cell},
author = {Shen, G and Boussiba, S and Vermaas, W F},
year = {1993},
keywords = {Bacterial, Base Sequence, Cell Division, Cloning, Cyanobacteria, DNA, DNA Primers, Electron Transport, Gene Deletion, Genes, Molecular, Molecular Sequence Data, Phenotype, Photosynthetic Reaction Center Complex Proteins, Phycobilins, Phycobilisomes, Phycocyanin, Pyrroles, Spectrophotometry, Tetrapyrroles, light},
pages = {1853--1863},
}
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Upon transformation and segregation at low light intensity (5 microE m-2 sec-1), a PSI deletion strain was obtained that is light tolerant and grows reasonably well under photoheterotrophic conditions at 5 microE m-2 sec-1 (doubling time approximately 28 hr). Subsequent inactivation of apcE by an erythromycin resistance marker led to reduction of the phycobilin-to-chlorophyll ratio and to a further decrease in light sensitivity. The resulting PSI-less/apcE- strain grew photoheterotrophically at normal light intensity (50 microE m-2 sec-1) with a doubling time of 18 hr. Deletion of apcE in the wild type resulted in slow photoautotrophic growth. The remaining phycobilins in apcE- strains were inactive in transferring light energy to PSII. Cells of both the PSI-less and PSI-less/apcE- strains had an approximately sixfold enrichment of PSII on a chlorophyll basis and were as active in oxygen evolution (on a per PSII basis) as the wild type at saturating light intensity. Both PSI-less strains described here are highly appropriate both for detailed PSII studies and as background strains to analyze site- and region-directed PSII mutants in vivo.","language":"eng","number":"12","journal":"The Plant Cell","author":[{"propositions":[],"lastnames":["Shen"],"firstnames":["G"],"suffixes":[]},{"propositions":[],"lastnames":["Boussiba"],"firstnames":["S"],"suffixes":[]},{"propositions":[],"lastnames":["Vermaas"],"firstnames":["W","F"],"suffixes":[]}],"year":"1993","keywords":"Bacterial, Base Sequence, Cell Division, Cloning, Cyanobacteria, DNA, DNA Primers, Electron Transport, Gene Deletion, Genes, Molecular, Molecular Sequence Data, Phenotype, Photosynthetic Reaction Center Complex Proteins, Phycobilins, Phycobilisomes, Phycocyanin, Pyrroles, Spectrophotometry, Tetrapyrroles, light","pages":"1853–1863","bibtex":"@article{shen_synechocystis_1993,\n\ttitle = {Synechocystis sp {PCC} 6803 strains lacking photosystem {I} and phycobilisome function},\n\tvolume = {5},\n\tissn = {1040-4651},\n\turl = {http://www.ncbi.nlm.nih.gov/pubmed/8305875},\n\tabstract = {To design an in vivo system allowing detailed analysis of photosystem II (PSII) complexes without significant interference from other pigment complexes, part of the psaAB operon coding for the core proteins of photosystem I (PSI) and part of the apcE gene coding for the anchor protein linking the phycobilisome to the thylakoid membrane were deleted from the genome of the cyanobacterium Synechocystis sp strain PCC 6803. Upon transformation and segregation at low light intensity (5 microE m-2 sec-1), a PSI deletion strain was obtained that is light tolerant and grows reasonably well under photoheterotrophic conditions at 5 microE m-2 sec-1 (doubling time approximately 28 hr). Subsequent inactivation of apcE by an erythromycin resistance marker led to reduction of the phycobilin-to-chlorophyll ratio and to a further decrease in light sensitivity. The resulting PSI-less/apcE- strain grew photoheterotrophically at normal light intensity (50 microE m-2 sec-1) with a doubling time of 18 hr. Deletion of apcE in the wild type resulted in slow photoautotrophic growth. The remaining phycobilins in apcE- strains were inactive in transferring light energy to PSII. Cells of both the PSI-less and PSI-less/apcE- strains had an approximately sixfold enrichment of PSII on a chlorophyll basis and were as active in oxygen evolution (on a per PSII basis) as the wild type at saturating light intensity. 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